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level: Gravitation

Questions and Answers List

level questions: Gravitation

QuestionAnswer
what is a projectileany object that is launched and moves under the influence of gravity
what is the path taken by a projectile calledits trajectory
what is a satellitea special type of projectile that follows a circular orbit due to its constant horizontal velocity constant vertical acceleration
what is the path followed by a satellite calledits orbit
why do satellites have a circular orbitbecause they fall towards the earth at the same rate as the earth's surface curves away from it
why do astronauts in orbit around the earth experience apparent weightlessnessthey are in a constant state of freefall as the spaceship, astronauts and everything inside are all accelerating towards the earth due to gravity.
what is gravitational field strengthweight per unit mass in Nkg-1
what is Newtons Law of Universal Gravitationevery object in the universe with a mass attracts every other object with a mass
what is the formula for gravitational force of attraction between any two objectsF=G(m1m2)/r^2 F is gravitational force of attraction in Netwons G is the universal constant of gravitation in metres per kilogram per second squared (m^3kg-1s-2) m1 is the mass of object 1 iin kg m2 is the mass of object 2 in kg r is the distance between the centres of masses in metres
why is the formula for newtons law of universal gravitation an inverse square lawbecause the gravitational force of attraction between two objects varies inversely with the square of the distance between them (as the distance between the two objects doubles, the force of attraction between them quarters)
what type of force is gravitation between two objectsa mutual force between two objects this means that object 1 will exert a force on object 2 that is equal in magnitude but opposite in direction to the force exterted by object 2 on object 1